Given the angle theta_min, what is the maximum weight (or load) W_L,max that this crane can lift without tipping forward?

Given the angle theta_min, what is the maximum weight (or load) W_L,max that this crane can lift without tipping forward? (Recall that weight has units of force.)Express the maximum load in terms of theta_min and other quanitites given in the problem introduction:A crane of weight has a length (wheelbase) , and its center of mass is midway between the wheels (i.e., the mass of the lifting arm is negligible). The arm extending from the front of the crane has a length and makes an angle with the horizontal. The crane contacts the ground only at its front and rear tires.